<template>
  <div>
    <!-- 面包屑导航 -->
    <el-breadcrumb separator-class="el-icon-arrow-right">
      <el-breadcrumb-item :to="{ path: '/home' }">首页</el-breadcrumb-item>
      <el-breadcrumb-item>商品管理</el-breadcrumb-item>
      <el-breadcrumb-item>商品分类</el-breadcrumb-item>
    </el-breadcrumb>
    <!-- 卡片视图 -->
    <el-card>
      <el-button type="primary" @click="showAddCateDialog">添加分类</el-button>

      <tree-table
        :data="cateList"
        :columns="columns"
        :selection-type="false"
        :expand-type="false"
        show-index
        border
        class="treeTable"
      >
        <!-- 是否有效模板 -->
        <template v-slot:isok="scope">
          <i
            class="el-icon-success"
            v-if="scope.row.cat_deleted === false"
            style="color: lightgreen"
          ></i>
          <i class="el-icon-error" v-else style="color: red"></i>
        </template>
        <!-- 排序模板 -->
        <template v-slot:order="scope">
          <el-tag size="mini" v-if="scope.row.cat_level === 0">一级</el-tag>
          <el-tag
            type="success"
            size="mini"
            v-else-if="scope.row.cat_level === 1"
            >二级</el-tag
          >
          <el-tag type="warning" size="mini" v-else>三级</el-tag>
        </template>
        <!-- 操作模板 -->
        <template v-slot:opt='scope'>
          <el-button 
          type="primary" 
          icon="el-icon-edit" 
          size="mini"
          @click="showEditDialog(scope.row.cat_id)"
            >编辑</el-button
          >
          <el-button
           type="danger" 
           icon="el-icon-delete" 
           size="mini"
           @click="removeCateById(scope.row.cat_id)"
            >删除</el-button
          >
        </template>
      </tree-table>

      <!-- 分页区域 -->
      <el-pagination
        @size-change="handleSizeChange"
        @current-change="handleCurrentChange"
        :current-page="queryInfo.pagenum"
        :page-sizes="[3, 5, 10, 15]"
        :page-size="queryInfo.pagesize"
        layout="total, sizes, prev, pager, next, jumper"
        :total="total"
      >
      </el-pagination>
    </el-card>

    <!-- 添加分类对话框 -->
    <el-dialog
      title="添加分类"
      :visible.sync="addCateDialogVisible"
      width="50%"
      @close='addCateDialogClosed'
    >
      <el-form
        :model="addCateForm"
        :rules="addCateFormRules"
        ref="addCateFormRef"
        label-width="100px"
      >
        <el-form-item label="分类名称" prop="cat_name">
          <el-input v-model="addCateForm.cat_name"></el-input>
        </el-form-item>
        <el-form-item label="父级分类">
          <el-cascader
            popper-class="flotage"
            v-model="selectedKeys"
            :options="parentCateList"
            :props="{
              expandTrigger: 'hover',
              checkStrictly:'true',
              value: 'cat_id',
              label: 'cat_name',
              children: 'children'
            }"
            @change="parentCateChange"
            clearable
            
          ></el-cascader>
        </el-form-item>
      </el-form>

      <span slot="footer" class="dialog-footer">
        <el-button @click="addCateDialogVisible = false">取 消</el-button>
        <el-button type="primary" @click="addCate"
          >确 定</el-button
        >
      </span>
    </el-dialog>

    <!-- 修改用户对话框 -->
    <el-dialog
      title="修改分类"
      :visible.sync="editDialogVisible"
      width="50%"
      @close="editDialogClosed"
    >
      <el-form :model="editForm" ref="editFormRef" label-width="70px">
        <el-form-item label="分类名称">
          <el-input v-model="editForm.cat_name"></el-input>
        </el-form-item>
      </el-form>
      <span slot="footer" class="dialog-footer">
        <el-button type="primary" @click="editCateInfo">确 定</el-button>
        <el-button @click="editDialogVisible = false">取 消</el-button>
      </span>
    </el-dialog>
  </div>
</template>

<script>
export default {
  name: 'GoodsCate',
  created() {
    this.getCateList()
  },
  data() {
    return {
      queryInfo: {
        type: 3,
        pagenum: 1,
        pagesize: 5,
      },
      cateList: [],
      total: 0,
      columns: [
        {
          label: '分类名称',
          prop: 'cat_name',
        },
        {
          label: '是否有效',
          type: 'template',
          template: 'isok',
        },
        {
          label: '排序',
          type: 'template',
          template: 'order',
        },
        {
          label: '操作',
          type: 'template',
          template: 'opt',
        },
      ],
      addCateDialogVisible: false,
      addCateForm: {
        cat_name: '',
        cat_pid: 0,
        cat_level: 0,
      },
      addCateFormRules: {
        cat_name: [
          { required: true, message: '请输入分类名称', trigger: 'blur' },
        ],
      },
      parentCateList: [],
      selectedKeys: [],
      editDialogVisible:false,
      editForm:{}
    }
  },
  methods: {
    async getCateList() {
      const { data: res } = await this.$http.get('categories', {
        params: this.queryInfo,
      })

      if (res.meta.status !== 200) {
        return this.$message.error('获取商品分类失败')
      }

      this.cateList = res.data.result
      this.total = res.data.total
    },
    handleSizeChange(newSize) {
      this.queryInfo.pagesize = newSize
      this.getCateList()
    },
    handleCurrentChange(newCurrent) {
      this.queryInfo.pagenum = newCurrent
      this.getCateList()
    },
    showAddCateDialog() {
      this.getParentCateList()
      this.addCateDialogVisible = true
    },
    async getParentCateList() {
      const { data: res } = await this.$http.get('categories', {
        params: { type: 2 },
      })

      if (res.meta.status !== 200) {
        return this.$message.error('获取父级分类失败')
      }

      this.parentCateList = res.data
    },
    parentCateChange() {
      if(this.selectedKeys.length > 0){
        this.addCateForm.cat_pid = this.selectedKeys[this.selectedKeys.length-1]
        this.addCateForm.cat_level = this.selectedKeys.length
        return
      }else{
        this.addCateForm.cat_pid = 0
        this.addCateForm.cat_level = 0
      }
    },
    addCate(){
      this.$refs.addCateFormRef.validate(async valid => {
        if(!valid) return
        const {data:res} = await this.$http.post('categories',this.addCateForm)

        if(res.meta.status !== 201){
          return this.$message.error("添加分类失败")
        }

        this.$message.success("添加分类成功")
        this.getCateList()
        this.addCateDialogVisible = false
      })
    },
    addCateDialogClosed(){
      this.$refs.addCateFormRef.resetFields()
      this.selectedKeys = []
      this.addCateForm.cat_level = 0
      this.addCateForm.cat_pid = 0
    },
    editDialogClosed(){
      this.$refs.editFormRef.resetFields()
    },
    async showEditDialog(id) {
      const { data: res } = await this.$http.get('categories/'+id)
      if (res.meta.status !== 200) {
        return this.$message.error('查询不到分类信息')
      }
      this.editForm = res.data
      this.editDialogVisible = true
    },
    editCateInfo(){
      this.$refs.editFormRef.validate(async (valid) => {
        if (!valid) return
        const { data: res } = await this.$http.put(
          'categories/' + this.editForm.cat_id,{cat_name:this.editForm.cat_name})
          console.log(res);
        if (res.meta.status !== 200) {
          return this.$message.error('更新分类信息失败')
        }

        this.editDialogVisible = false
        this.getCateList()
        this.$message.success('更新分类信息成功')
      })
    },
    async removeCateById(id) {
      const confirmResult = await this.$confirm(
        '此操作将永久删除该分类, 是否继续?',
        '提示',
        {
          confirmButtonText: '确定',
          cancelButtonText: '取消',
          type: 'warning',
        }
      ).catch((err) => err)

      if (confirmResult !== 'confirm') {
        return this.$message.info('已取消删除操作')
      }

      const { data: res } = await this.$http.delete('categories/' + id)
      if (res.meta.status !== 200) {
        return this.$message.error('删除分类失败')
      }

      this.$message.success('删除分类成功')
      this.getCateList()
    },
  },
}
</script>

<style lang='less' scoped>
.treeTable {
  margin-top: 16px;
}

.el-cascader{
  width: 100%;
}

</style>